Multilayer nanometer coating technology, with waterproof, oilproof, , scratchproof features. Can effectively protect the lens from dust scratches, ensure the safety of your camera. Gradient blue filter is suitable for bad weather, rosy clouds or hazy weather, can restore the sky clear blue, to achieve a good color balance. Gradient yellow filter is suitable for wheat, grassland, rape flowers, and gorgeous color, is one of the most important photography art creation filter. Gradient purple filter is made of blue and red. It is often used for scenery shooting to set off the dreamlike purple effect. Fitment: for for Nikon for Sony for Olympus for Fuji, camera lens with 52mm interface